
<template>
    <div>
      <el-breadcrumb separator="/">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item><a href="/">权限管理</a></el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>
  
      <el-card>
        <!-- 添加角色按钮区域 -->
        <el-row>
          <el-col>
            <el-button type="primary" @click="addRoleDialogVisible = true">
              添加角色
            </el-button>
          </el-col>
        </el-row>
        <!-- 角色列表 -->
        <el-table :data="rolesList" border stripe>
          <!-- 展开列 -->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row
                :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
                v-for="(item1, i1) in scope.row.children"
                :key="item1.id">
                <!-- 渲染一级权限 -->
                <el-col :span="5">
                  <el-tag closable @close="removeRightById(scope.row, item1.id)">
                    {{ item1.authName }}
                  </el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 渲染二级和三级权限 -->
                <el-col :span="19">
                  <!-- 通过for循环嵌套渲染二级权限 -->
                  <el-row
                    :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                    v-for="(item2, i2) in item1.children"
                    :key="item2.id"
                  >
                    <el-col :span="6">
                      <el-tag
                        type="success"
                        closable
                        @close="removeRightById(scope.row, item2.id)"
                      >
                        {{ item2.authName }}
                      </el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <el-tag
                        type="warning"
                        v-for="item3 in item2.children"
                        :key="item3.id"
                        closable
                        @close="removeRightById(scope.row, item3.id)"
                      >
                        {{ item3.authName }}
                      </el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </template>
          </el-table-column>
          <!-- 索引列 -->
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <el-button
                type="primary"
                icon="el-icon-edit"
                size="mini"
                @click="showEditDialog(scope.row.id)"
              >
                编辑
              </el-button>
              <el-button
                type="danger"
                icon="el-icon-delete"
                size="mini"
                @click="removeRoleById(scope.row.id)"
              >
                删除
              </el-button>
              <el-button
                type="warning"
                icon="el-icon-setting"
                size="mini"
                @click="showSetRightDialog(scope.row)"
              >
                分配权限
              </el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>
      <!-- 分配权限的对话框 -->
      <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%"
        @close="setRightDialogClosed"
      >
        <!-- 树形控件 -->
        <el-tree
          :data="rightsList"
          :props="treeProps"
          show-checkbox
          node-key="id"
          :default-expand-all="true"
          :default-checked-keys="defKeys"
          ref="treeRef"
        ></el-tree>
        <span slot="footer" class="dialog-footer">
          <el-button @click="dialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
      </el-dialog>
      <!-- 添加角色对话框 -->
      <el-dialog
        title="添加角色"
        :visible.sync="addRoleDialogVisible"
        width="50%"
        @close="addRoleDialogClosed"
      >
        <!-- 内容主体区域 -->
        <el-form
          :model="addForm"
          :rules="editFormRules"
          ref="addRoleFormRef"
          label-width="80px"
        >
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="addForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="addForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="resetRoleForm">重置</el-button>
          <el-button @click="addRoleDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addRole">确 定</el-button>
        </span>
      </el-dialog>
      <!-- 修改角色名称的对话框 -->
      <el-dialog
        title="修改角色"
        :visible.sync="editRoleDialogVisible"
        width="50%"
        @close="editDialogClosed"
      >
        <el-form
          :model="editRoleForm"
          :rules="editFormRules"
          ref="editFormRef"
          label-width="80px"
        >
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="editRoleForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="editRoleForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editRoleDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editRoleInfo">确 定</el-button>
        </span>
      </el-dialog>
    </div>
  </template>
  <script>
  export default {
    data() {
      return {
        // 所有角色列表数据
        rolesList: [],
        // 控制分配权限对话框的显示与隐藏
        setRightDialogVisible: false,
        // 所有权限的数据
        rightsList: [],
        // 树形控件的属性绑定对象
        treeProps: {
          children: 'children',
          label: 'authName'
        },
        // 默认选中的节点id值数组
        defKeys: [],
        // 当前即将分配权限的角色id
        roleId: '',
        // 控制修改角色对话框的显示与隐藏
        editRoleDialogVisible: false,
        // 添加角色的表单数据
        addForm: {
          roleName: '',
          roleDesc: ''
        },
        // 查询到的用户角色信息对象
        editRoleForm: {},
        // 添加表单验证规则
        editFormRules: {
          roleName: [
            { required: true, message: '请输入角色名称', trigger: 'blur' },
            {
              min: 2,
              max: 10,
              message: '角色名称的长度在2-10个字符之间',
              trigger: 'blur'
            }
          ],
          roleDesc: [
            { required: true, message: '请输入角色描述', trigger: 'blur' },
            {
              min: 2,
              max: 15,
              message: '用户密码的长度在2-15个字符之间',
              trigger: 'blur'
            }
          ]
        },
        // 控制添加角色对话框的显示与隐藏
        addRoleDialogVisible: false
      }
    },
    created() {
      this.getRolesList()
    },
    methods: {
      // 获取角色列表
      async getRolesList() {
        const { data: res } = await this.$http.get('roles')
        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败了！')
        }
        this.rolesList = res.data
        console.log(this.rolesList)
      },
      // 根据id删除对应的权限
      async removeRightById(role, rightId) {
        // 弹框提示用户是否删除
        const confirmResult = await this.$confirm(
          '此操作将永久删除该文件, 是否继续?',
          '提示',
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
        ).catch(err => err)
        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除！')
        }
        const { data: res } = await this.$http.delete(
          `roles/${role.id}/rights/${rightId}`
        )
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败！')
        }
        role.children = res.data
      },
      // 展示分配权限的对话框
      async showSetRightDialog(role) {
        this.roleId = role.id
        // 获取所有权限的数据
        const { data: res } = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) {
          return this.$message.error('获取权限数据失败！')
        }
        // 获取到的权限数据保存到data中
        this.rightsList = res.data
        console.log(this.rightsList)
        // 递归获取三级节点的id
        this.getLeafKeys(role, this.defKeys)
        this.setRightDialogVisible = true
      },
      // 通过递归的形式获取角色下所有三级权限的id，并保存到defKeys数组中
      getLeafKeys(node, arr) {
        // 如果当前node不包括children属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }
        node.children.forEach(item => this.getLeafKeys(item, arr))
      },
      // 监听分配权限对话框的关闭事件
      setRightDialogClosed() {
        this.defKeys = []
      },
      // 点击为角色分配的权限
      async allotRights() {
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr = keys.join(',')
        const { data: res } = await this.$http.post(
          `roles/${this.roleId}/rights`,
          { rids: idStr }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('分配权限失败！')
        }
        this.$message.success('分配权限成功了！')
        this.getRolesList()
        this.setRightDialogVisible = false
      },
      // 展示修改角色的对话框
      async showEditDialog(id) {
        const { data: res } = await this.$http.get('roles/' + id)
        if (res.meta.status !== 200) {
          return this.$message.error('查询角色信息失败了！')
        }
        this.editRoleForm = res.data
        this.editRoleDialogVisible = true
      },
      // 修改角色信息并提交
      editRoleInfo() {
        this.$refs.editFormRef.validate(async valid => {
          if (!valid) return false
  
          const { data: res } = await this.$http.put(
            'roles/' + this.editRoleForm.roleId,
            {
              roleName: this.editRoleForm.roleName,
              roleDesc: this.editRoleForm.roleDesc
            }
          )
  
          if (res.meta.status !== 200) {
            return this.$message.error('更新角色信息失败！')
          }
          // 关闭对话框
          this.editRoleDialogVisible = false
          // 刷新数据列表
          this.getRolesList()
          // 提示修改成功
          this.$message.success('更新用户信息成功！')
        })
      },
      // 监听编辑提交角色对话框的关闭事件
      editDialogClosed() {
        this.$refs.editFormRef.resetFields()
      },
      // 点击按钮，添加角色
      addRole() {
        this.$refs.addRoleFormRef.validate(async valid => {
          if (!valid) return false
          // 验证通过了，可以发起添加用户的网络请求
          const { data: res } = await this.$http.post('roles', this.addForm)
          if (res.meta.status !== 201) {
            this.$message.error('添加用户失败！')
          }
          this.$message.success('添加用户成功！')
          // 隐藏添加用户的对话框
          this.addRoleDialogVisible = false
          // 重新获取用户的列表
          this.getRolesList()
        })
      },
      // 重置添加角色表单
      resetRoleForm() {
        this.$refs.addRoleFormRef.resetFields()
      },
      // 监听添加角色对话框的关闭事件
      addRoleDialogClosed() {
        this.$refs.addRoleFormRef.resetFields()
      },
  
      async removeRoleById(id) {
        // 询问用户是否删除弹框
        const confirmResult = await this.$confirm(
          '此操作将永久删除该角色, 是否继续?',
          '温馨提示',
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
        ).catch(err => err)
        if (confirmResult !== 'confirm') {
          return this.$message.info('已取消删除')
        }
        const { data: res } = await this.$http.delete('roles/' + id)
        if (res.meta.status !== 200) {
          return this.$message.error('删除角色失败！')
        }
        this.$message.success('删除角色成功！')
        this.getRolesList()
      }
    }
  }
  </script>
  <style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }
  .bdtop {
    border-top: 1px solid #eee;
  }
  .bdbottom {
    border-bottom: 1px solid #eee;
  }
  .vcenter {
    display: flex;
    align-items: center;
  }
  </style>
  